Discussion
Which of the following provides specific defence against viruses and bacteria by producing antibodies?
Answer: B
Correct answer: B cells
Antibodies are made by B cells - strictly, by the plasma cells they mature into - and each antibody fits one particular antigen, which is what makes the defence specific. Complement and inflammation are innate and non-specific; T cells are specific too, but they act on infected cells rather than by secreting antibody.
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